I found a difference! On the Norwegian Star the balconies on the deck 11 in the BA cabins (mid ship) have a 54ft balcony compared to 37ft balconies on all other decks for the same category! Stateroom sizes are the same..166ft

I stayed in cabin 8217 on the Norwegian Wind. The deckplans on NCL's site list cabin 8217 as blank on Norway - Deck 8. The cabin has a full obstructed view. The cabin has nothing extra special.
This is the site for NCL Wind's deckplans for Norway - Deck 8http://164.109.173.140/fleet/04/dp/r_040_dp_norway.htm
Here's proof of cabin 8217's existance.
[img]C:\Documents and Settings\Eric Kalman\My Documents\My Pictures\Cruise 3-2004\8. Near Miami 3-27\Picture2 277.jpg[/img]